Hello Davo
Ridgeline is not supported on Ubuntu below are the supported versions.
Microsoft Windows Vista, Windows XP Professional with SP1
or later
Minimum 1 GB RAM (2 GB or higher recommended)
Minimum 2 GB free disk space
1 GHz Pentium-compatible processor (2+ GHz recommended)
Windows 2003 Server
Solaris 10*
Red Hat Enterprise Linux 5.0**
Microsoft Windows 2008 Server
Microsoft Windows 7***
Thanks
P